Brooch



UNITED sTATEs PATENT oEErcE.

HENRY OLIVER, OF PHILADELPHIA, PENNSYLVANIA.

BROOCH, EAR-RING, &C.

Specification of Letters Patent No. 23,042, dated February 22, 1859.

To all whom it may concern:

Be it known that I, HENRY OLIVER, of the city and county ofPhiladelphia, in the State of Pennsylvania, have invented certain newandvuseful Improvements in Photographic or Sun Pictures; and I herebydeclare that the following is a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, making a partof this specification, in which- Figure l represents a front View of abrooch and Fig. 2 a vertical section of the same. Fig. 3 a front view ofa modification of Fig. l and F ig. 4 a vertical section of Fiv'. 3.

rhe letters of reference indicate the same parts in the differentfigures.

Hy invention relates to the production of permanent photographic or sunpictures upon concave surfaces of glass by causing the picture to betaken on a collodion film or its equivalent on the inner or concavesurface of glass, and then to be coated or backed with suitable cementfor the purpose of producing a new article of ornamental manufactureviz., brooches, buckles, etc.

The following is a description of the application of my invention in themanufacture of imitation jet brooches.

Figs. l and 2 represent a circular brooch, composed of a watch crystal aupon the inner or concave surface of which a photographic image is fixedby any convenient process, the crystal being held in the camera duringthe operation, in a glass frame or holder. When the picture is finishedthe concavity is filled with cement b, composed of gum shellac7 resinand coal tar, in the proportions of siX parts by Weight of resin; one ofcoal tar and one of gum shellac; in which the pin o is secured. Figs. 3and trepresent an ellipsoidal brooch manufactured in a similar manner.

My improvement is applicable to a great variety of ornamental purposessuch as earrings, covers of snuff-boxes, porteinonnaies, etc.

A peculiar and beautiful effect is pro duced by placing a photographicpicture upon the concave surface and the appearance of the finest enamelpainting is readily imitated. The iigures show up in relief, which isnot the case when the picture is upon a flat surface.

I am aware that sun pictures have been produced upon the inner surfacesof planes of transparent material and that temporary concave fields havebeen suggested to overcome the spherical aberration of the lenses in theproduction of pictures having a plane surface; but

What I claim as my invention is Photographic or sun pictures uponconcave surfaces of glass and backing it up with cement in the mannerand for the purpose substantially as above specified.

HENRY OLIVER.

Vitnesses J. GWINN CHILD, J. H. B. JENKINS.

